mirror of https://github.com/YosysHQ/abc.git
Experiments with inductive don't-cares.
This commit is contained in:
Alan Mishchenko
parent
818aa231ce
commit
56110efaad
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@ -4720,7 +4720,7 @@ int Abc_CommandMfs2( Abc_Frame_t * pAbc, int argc, char ** argv )
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}
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if ( fIndDCs )
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{
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if ( pAbc->nIndFrames <= 1 )
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if ( pAbc->nIndFrames <= 0 )
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{
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Abc_Print( -1, "The number of k-inductive frames is not specified.\n" );
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return 1;
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@ -21,6 +21,7 @@
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#include "base/abc/abc.h"
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#include "bool/kit/kit.h"
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#include "opt/sfm/sfm.h"
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#include "base/io/ioAbc.h"
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ABC_NAMESPACE_IMPL_START
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@ -33,132 +34,6 @@ ABC_NAMESPACE_IMPL_START
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/// FUNCTION DEFINITIONS ///
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////////////////////////////////////////////////////////////////////////
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/**Function*************************************************************
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Synopsis [Unrolls logic network while dropping some next-state functions.]
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Description [Returns the unrolled network.]
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SideEffects []
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SeeAlso []
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***********************************************************************/
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Abc_Ntk_t * Abc_NtkUnrollAndDrop( Abc_Ntk_t * p, int nFrames, Vec_Int_t * vFlops, int * piPivot )
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{
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Abc_Ntk_t * pNew;
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Abc_Obj_t * pFanin, * pNode;
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Vec_Ptr_t * vNodes;
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int i, k, f, Value;
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assert( Abc_NtkIsLogic(p) );
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assert( Vec_IntSize(vFlops) == Abc_NtkLatchNum(p) );
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*piPivot = -1;
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// start the network
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pNew = Abc_NtkAlloc( p->ntkType, p->ntkFunc, 1 );
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pNew->pName = Extra_UtilStrsav(Abc_NtkName(p));
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// add CIs for the new network
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Abc_NtkForEachCi( p, pNode, i )
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pNode->pCopy = Abc_NtkCreatePi( pNew );
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// iterate unrolling
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vNodes = Abc_NtkDfs( p, 0 );
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for ( f = 0; f < nFrames; f++ )
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{
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if ( f > 0 )
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{
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Abc_NtkForEachPi( p, pNode, i )
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pNode->pCopy = Abc_NtkCreatePi( pNew );
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}
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Vec_PtrForEachEntry( Abc_Obj_t *, vNodes, pNode, i )
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{
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Abc_NtkDupObj( pNew, pNode, 0 );
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Abc_ObjForEachFanin( pNode, pFanin, k )
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Abc_ObjAddFanin( pNode->pCopy, pFanin->pCopy );
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}
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Abc_NtkForEachCo( p, pNode, i )
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pNode->pCopy = Abc_ObjFanin0(pNode)->pCopy;
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Abc_NtkForEachPo( p, pNode, i )
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Abc_ObjAddFanin( Abc_NtkCreatePo(pNew), pNode->pCopy );
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// add buffers
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if ( f == 0 )
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{
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*piPivot = Abc_NtkObjNum(pNew);
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// Abc_NtkForEachCo( p, pNode, i )
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// pNode->pCopy = Abc_NtkCreateNodeBuf( pNew, pNode->pCopy );
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}
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// transfer to flop outputs
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Abc_NtkForEachLatch( p, pNode, i )
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Abc_ObjFanout0(pNode)->pCopy = Abc_ObjFanin0(pNode)->pCopy;
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}
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Vec_PtrFree( vNodes );
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// add final POs
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Vec_IntForEachEntry( vFlops, Value, i )
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{
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if ( Value == 0 )
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continue;
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pNode = Abc_NtkCo( p, Abc_NtkPoNum(p) + i );
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Abc_ObjAddFanin( Abc_NtkCreatePo(pNew), pNode->pCopy );
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}
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Abc_NtkAddDummyPiNames( pNew );
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Abc_NtkAddDummyPoNames( pNew );
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// perform combinational cleanup
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Abc_NtkCleanup( pNew, 0 );
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if ( !Abc_NtkCheck( pNew ) )
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fprintf( stdout, "Abc_NtkCreateFromNode(): Network check has failed.\n" );
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return pNew;
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}
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/**Function*************************************************************
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Synopsis [Updates the original network to include optimized nodes.]
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Description []
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SideEffects []
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SeeAlso []
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***********************************************************************/
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void Abc_NtkReinsertNodes( Abc_Ntk_t * p, Abc_Ntk_t * pNtk, int iPivot )
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{
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Abc_Obj_t * pNode, * pNodeNew, * pFaninNew;
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Vec_Ptr_t * vNodes;
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int i, k;
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assert( Abc_NtkIsLogic(p) );
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assert( Abc_NtkCiNum(p) <= Abc_NtkCiNum(pNtk) );
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vNodes = Abc_NtkDfs( p, 0 );
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// clean old network
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Abc_NtkCleanCopy( p );
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Abc_NtkForEachNode( p, pNode, i )
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{
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Abc_ObjRemoveFanins( pNode );
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pNode->pData = Abc_SopRegister( (Mem_Flex_t *)p->pManFunc, (char *)" 0\n" );
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}
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// map CIs
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Abc_NtkForEachCi( p, pNode, i )
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Abc_NtkCi(pNtk, i)->pCopy = pNode;
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// map internal nodes
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assert( Vec_PtrSize(vNodes) + Abc_NtkCiNum(p) + Abc_NtkPoNum(p) == iPivot );
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Vec_PtrForEachEntry( Abc_Obj_t *, vNodes, pNode, i )
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{
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pNodeNew = Abc_NtkObj( pNtk, Abc_NtkCiNum(p) + i );
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if ( pNodeNew == NULL )
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continue;
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pNodeNew->pCopy = pNode;
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}
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// connect internal nodes
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Vec_PtrForEachEntry( Abc_Obj_t *, vNodes, pNode, i )
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{
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pNodeNew = Abc_NtkObj( pNtk, Abc_NtkCiNum(p) + i );
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if ( pNodeNew == NULL )
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continue;
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assert( pNodeNew->pCopy == pNode );
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Abc_ObjForEachFanin( pNodeNew, pFaninNew, k )
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Abc_ObjAddFanin( pNodeNew->pCopy, pFaninNew->pCopy );
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pNode->pData = Abc_SopRegister( (Mem_Flex_t *)p->pManFunc, (char *)pNodeNew->pData );
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}
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Vec_PtrFree( vNodes );
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}
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/**Function*************************************************************
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Synopsis []
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@ -411,6 +286,136 @@ int Abc_NtkPerformMfs( Abc_Ntk_t * pNtk, Sfm_Par_t * pPars )
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}
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/**Function*************************************************************
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Synopsis [Unrolls logic network while dropping some next-state functions.]
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Description [Returns the unrolled network.]
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SideEffects []
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SeeAlso []
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***********************************************************************/
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Abc_Ntk_t * Abc_NtkUnrollAndDrop( Abc_Ntk_t * p, int nFrames, Vec_Int_t * vFlops, int * piPivot )
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{
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Abc_Ntk_t * pNtk;
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Abc_Obj_t * pFanin, * pNode;
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Vec_Ptr_t * vNodes;
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int i, k, f, Value;
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assert( Abc_NtkIsLogic(p) );
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assert( Vec_IntSize(vFlops) == Abc_NtkLatchNum(p) );
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*piPivot = -1;
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// start the network
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pNtk = Abc_NtkAlloc( p->ntkType, p->ntkFunc, 1 );
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pNtk->pName = Extra_UtilStrsav(Abc_NtkName(p));
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// add CIs for the new network
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Abc_NtkForEachCi( p, pNode, i )
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pNode->pCopy = Abc_NtkCreatePi( pNtk );
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// iterate unrolling
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vNodes = Abc_NtkDfs( p, 0 );
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for ( f = 0; f <= nFrames; f++ )
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{
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if ( f > 0 )
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{
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Abc_NtkForEachPi( p, pNode, i )
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pNode->pCopy = Abc_NtkCreatePi( pNtk );
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}
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Vec_PtrForEachEntry( Abc_Obj_t *, vNodes, pNode, i )
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{
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Abc_NtkDupObj( pNtk, pNode, 0 );
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Abc_ObjForEachFanin( pNode, pFanin, k )
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Abc_ObjAddFanin( pNode->pCopy, pFanin->pCopy );
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}
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Abc_NtkForEachCo( p, pNode, i )
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pNode->pCopy = Abc_ObjFanin0(pNode)->pCopy;
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Abc_NtkForEachPo( p, pNode, i )
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Abc_ObjAddFanin( Abc_NtkCreatePo(pNtk), pNode->pCopy );
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// add buffers
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if ( f == 0 )
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{
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*piPivot = Abc_NtkObjNum(pNtk);
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// Abc_NtkForEachLatchInput( p, pNode, i )
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// pNode->pCopy = Abc_NtkCreateNodeBuf( pNtk, pNode->pCopy );
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}
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// transfer to flop outputs
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Abc_NtkForEachLatch( p, pNode, i )
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Abc_ObjFanout0(pNode)->pCopy = Abc_ObjFanin0(pNode)->pCopy;
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// add final POs
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if ( f > 0 )
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{
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Vec_IntForEachEntry( vFlops, Value, i )
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{
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if ( Value == 0 )
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continue;
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pNode = Abc_NtkCo( p, Abc_NtkPoNum(p) + i );
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Abc_ObjAddFanin( Abc_NtkCreatePo(pNtk), pNode->pCopy );
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}
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}
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}
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Vec_PtrFree( vNodes );
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Abc_NtkAddDummyPiNames( pNtk );
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Abc_NtkAddDummyPoNames( pNtk );
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// perform combinational cleanup
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Abc_NtkCleanup( pNtk, 0 );
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if ( !Abc_NtkCheck( pNtk ) )
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fprintf( stdout, "Abc_NtkCreateFromNode(): Network check has failed.\n" );
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return pNtk;
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}
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/**Function*************************************************************
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Synopsis [Updates the original network to include optimized nodes.]
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Description []
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SideEffects []
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SeeAlso []
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***********************************************************************/
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void Abc_NtkReinsertNodes( Abc_Ntk_t * p, Abc_Ntk_t * pNtk, int iPivot )
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{
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Abc_Obj_t * pNode, * pNodeNew, * pFaninNew;
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Vec_Ptr_t * vNodes;
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int i, k;
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assert( Abc_NtkIsLogic(p) );
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assert( Abc_NtkCiNum(p) <= Abc_NtkCiNum(pNtk) );
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vNodes = Abc_NtkDfs( p, 0 );
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// clean old network
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Abc_NtkCleanCopy( p );
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Abc_NtkForEachNode( p, pNode, i )
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{
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Abc_ObjRemoveFanins( pNode );
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pNode->pData = Abc_SopRegister( (Mem_Flex_t *)p->pManFunc, (char *)" 0\n" );
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}
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// map CIs
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Abc_NtkForEachCi( p, pNode, i )
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Abc_NtkCi(pNtk, i)->pCopy = pNode;
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// map internal nodes
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assert( Vec_PtrSize(vNodes) + Abc_NtkCiNum(p) + Abc_NtkPoNum(p) == iPivot );
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Vec_PtrForEachEntry( Abc_Obj_t *, vNodes, pNode, i )
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{
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pNodeNew = Abc_NtkObj( pNtk, Abc_NtkCiNum(p) + i );
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if ( pNodeNew == NULL )
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continue;
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pNodeNew->pCopy = pNode;
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}
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// connect internal nodes
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Vec_PtrForEachEntry( Abc_Obj_t *, vNodes, pNode, i )
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{
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pNodeNew = Abc_NtkObj( pNtk, Abc_NtkCiNum(p) + i );
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if ( pNodeNew == NULL )
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continue;
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assert( pNodeNew->pCopy == pNode );
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Abc_ObjForEachFanin( pNodeNew, pFaninNew, k )
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Abc_ObjAddFanin( pNodeNew->pCopy, pFaninNew->pCopy );
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pNode->pData = Abc_SopRegister( (Mem_Flex_t *)p->pManFunc, (char *)pNodeNew->pData );
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}
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Vec_PtrFree( vNodes );
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}
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/**Function*************************************************************
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Synopsis [Performs MFS for the unrolled network.]
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@ -440,6 +445,7 @@ int Abc_NtkMfsAfterICheck( Abc_Ntk_t * p, int nFrames, Vec_Int_t * vFlops, Sfm_P
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Abc_NtkToSop( p, 0 );
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// derive unfolded network
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pNtk = Abc_NtkUnrollAndDrop( p, nFrames, vFlops, &iPivot );
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Io_WriteBlifLogic( pNtk, "unroll_dump.blif", 0 );
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// collect information
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pp = Abc_NtkExtractMfs2( pNtk, iPivot );
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// perform optimization
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